Centimeter radiation associated with the solar limb prominence of 8 February 1972

Abstract

Detailed maps of the Sun have been made on 8 and 9 February 1972 with a 2.2′ pencil beam. Superimposed upon a disc that shows only slight limb brightening, there are a number of radio emissive regions associated with centers of activity. Relatively intense radiation from the position of a limb prominence is apparent on 8 February but is absent on the 9th. Between observations the prominence became active leading to the ejection of a cloud of plasma. When the emission from the prominence at 2.2 cm is combined with observations at 10.7 cm, the spectral index obtained is much flatter than that usually associated with a center of activity.